Thermostatic valve.



UNITED STATES PATENT OFFICE.

WILLIAM HOUSHOLDER, 0F YOUNGWOOD, PENNSYLVANIA, ASSIGNOR TO ROBERTSHAW MANUFACTURING COMPANY, OF YOUNGWOOD, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

THERMOSTATIC VALVE.

Application filed Apfl129, 1915.

To all whom it may concern Be it known that I, WILLIAM Hoos- HOLDER, a citizen of the United States, residing at Youngwood, Westmore-land' county, Pennsylvania, have invented a. new and useful Improvement in Thermostatic Valves, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in wh1ch Figures 1 and 2 are views partly in section and partly in side elevation of a ther mostatic valve mechanism embodying my invention, and I Figs. 3, 4, 5, 6 and 7 are detail views of certain of the parts hereinafter more fully described.

My invention has,relation to thermostatic valve mechanism; and is designed to provide mechanism of this character in which the valve may be automatically controlled by the action of the thermostat in both its opening and closing movement, thereby obviating the use of springs for movin the valve in one direction. A further ob]ect of the invention is to provide a simple and efficient arrangement of the multiplying leyers which transmit the contraction and expansion movements of the thermostat to the valve. Another object is to provide a valve adjust ing device of an efiicient character.

My invention will be best understood by reference to the accompanying drawings, in which I have shown a preferred embodiment thereof, and which will now be described, it being premised, however, that various changes can be made in the details of construction and arrangementof the several parts without departing from the spirit and scope of my invention as defined in the appended claims. I

In the drawings the numeral2 designates a frame member or bracket havin the externally threaded plug portion 3 a apted to screw into an opening in the wall of a. heater, as shown in Fig, 1. 4 and 5 designate a-compound thermostat of a well known type which extends into the heater to be affected by the temperature therein.

' The frame 2 is formed with the internally threaded socket portion 2 into which a valve casing 6 is screwed. This casing has the inlet connection 7 at one side and the outlet connection 8 at the opposite side, with an internal port 9 forming a connection be- Speciflcation of Letters Patent.

Patented Jan. 28, 1919.

Serial No. 24,755.

tween the inlet and outlet sides of the valve chamber. One'edge of said opening forms a valve seat 10. 11 is a disk valve adapted to said seat and having an outwardly extending central projection 12 which has a sliding bearing at 13 in the wall of the casing, the latter having the internal boss 14 which extends this bearing. The outer end portion of the extension 12 has an internally threaded socket-12 into which is screwed the threaded portion 15 of a headed stud 16. This stud isformed with an internal socket 17 which is engaged by one end portion of a threaded adjusting member 18. The other end portion of said member has a reverse thread and engages 'a threaded socket in a head 19. 20 is a packing or diaphragm which is confined at its edges by ascrew cap 20 which is threaded onto a boss 21 on the end wall of the casing. At its centrahportion the diaphragm is secured between the shoulder portion of the stud 16 and the outer end of the valve extension 12.

designates a multiplying lever pivoted to the frame orbracket at 23 and. to which the inner end of the,thermostat element 4 is secured at a point adjacent to the pivot. The outer end portion of said lever is of hook shape, as indicated at 24 and embraces the convex end 25 of the short arm of a second multiplying lever 26. The lever 26 has a slotted end portion 27 which extends throngh a slot 28 of the head 19 and is secured therein by a pin 29, or in any other suitable manner. The convex end 25, together with the recess of the hook, form in effect a ball and socket connection between the two levers, the head 25 preferably fitting closely against opposite sides of the recess so as to prevent any lost motion.

The operation will be readily understood. As the temperature ofthe heater increases, the movement of the thermostatic element 4, acting through the multiplying levers, tends to draw the valve toward its seat. Both the expansion and contraction movements of this element are positively transmitted to the lever 22 and from said lever to the other lever 26 and thence to the valve. The valve is therefore controlled solely by the action of the thermostat under changes of tempera? ture, no spring or springs acting in opposition to the thermostat being necessary.

It will be observed that the two multiplying levers are so arranged as to greatly multiply,

i be; yet ensi t ivei ti) $light-te1npe1 atmrc 5j change s lt'hin the heater. Th0 ad usting I i nienibe I means i nioveinentj ofthe thermostaticelment willbe 1Q 1'ijui fto iin part :bgiven movemvnttn the vahfe. i i i 301 the inlet antlontlet sides ()Fthe ,valve 't'hjam 25 {ha k-juiiihi iatipn with a Talvdjtq lm cpn ri ollakl; at an angle. lttYtHl"ll ilYlllg izl longarin .t'nla zulnoil in a position at siihtan ally liigh'tanglag to tha first nan ml lave ha \"ing a 1611;! arm fol-mud at its Qoxti e niity with a linolgporticni hayiniy an-inner (om-ma SlllfilGCi the short arnnol' YllFyfil'St-IHUIHKI scribed.

I" the cmnbinat inn \vitlpa vali'q chan'ibe r; and: valve the 'mn hav nga ste,

S fO l'llls tl simple and 0m'en'i0nt 1 iemby the setting (if :thQ lval e -can belquiclybha ngeil so that a grant-01' 01'1 loss i stony of said valve, saiil I i v vxterio-l'ly Ofthe vah i l signates a by pass portconnecting .v i I bent adiln. of the "saiilaji igle her i 6111 the 'pu 'p'o'se Jofwsupplying a pilot 1 15 lightj if d e sia ed. This port may ha\' an I suitahlgf011trolling device such as the orbw and 1 m-iimmg; a cohwxwl and which [is ongagml l v said lugokiportiong:and ajthernm- Mafiaclvmbnt arrangwl to act on the lOIIg" arn ofthawcond lever; sahstantiallv as ilcj Ina device of the phai'atztn described a slmrtm-hent ia nn a t 

